<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>

  <body>
    <div id="app">{{getName}}</div>
    <script src="../dist/vue.js"></script>

    <script>
      let vm = new Vue({
        el: "#app",
        data: {
          name: "hulei",
          age: 12,
        },
        computed: {
          getName() {
            console.log("ok");
            return this.name + this.age;
          },
        },
      });
      setTimeout(() => {
        vm.name = "hl";
      }, 3000);
    </script>
  </body>
</html>
